@article{GDZPPN002042061,
title = {Permutable functions.},
journal = {Aequationes mathematicae},
volume = {52},
year = {1996},
pages = {201-214},
zbl = {0894.33006},
url = {http://dml.mathdoc.fr/item/GDZPPN002042061}
}
Coonce, H.B. Permutable functions.. Aequationes mathematicae, Tome 52 (1996) pp. 201-214. http://gdmltest.u-ga.fr/item/GDZPPN002042061/